yes, I have heard contrary rumors about Kwan Sai Hung, the most relevant of which here would be that he claims to have been a student of YCF. Then, if so, the question would be the amount of time he could have spent with him, etc. However, what I was most interested in was the claim he seems to have made that YCF taught him a practice with a stone ball. I've never heard of any such tradition in Yang family tjq, though I have heard of it within Chen style. Anyway, I just wanted to hear any confirmations or the opposite.